Configuring Schematic Sheet Symbol Designator Object Properties in Altium NEXUS

Parent page: Sheet Symbol Designator

Schematic editor object properties are definable options that specify the visual style, content and behavior of the placed object. The property settings for each type of object are defined in two different ways:

• Pre-placement settings – most Sheet Symbol Designator object properties, or those that can logically be pre-defined, are available as editable default settings on the Schematic - Defaults page of the Preferences dialog (access from the  button at the top-right of the design space). Select the object in the Primitive List to reveal its options on the right.

  

• Post-placement settings – all Sheet Symbol Designator object properties are available for editing in the Parameter dialog and the Properties panel when a placed Sheet Symbol Designator is selected in the design space.

  

Location (Properties panel only)

• (X/Y)
  • X (first field) - the current X (horizontal) coordinate of the reference point of the object, relative to the current design space origin. Edit to change the X position of the object. The value can be entered in either metric or imperial; include the units when entering a value whose units are not the current default. 
  • Y (second field) - The current Y (vertical) coordinate of the reference point of the object, relative to the current origin. Edit to change the Y position of the object. The value can be entered in either metric or imperial; include the units when entering a value whose units are not the current default. 
• Rotation - use the drop-down to select the rotation. 

Properties

• Sheet Symbol - the sheet symbol associated with this object.
• Name - displays the name.

• Value - displays the actual designator text. Use  or  to determine whether the Value for the object is displayed or hidden. Check Autoposition to enable auto-positioning.

  By using sheet symbol instantiation, multiple channels on the same sub-sheet can be referenced from a single sheet symbol. The syntax used involves the use of the Repeat keyword in the sheet symbol designator field and takes the form:

  Repeat(SheetSymbolDesignator, FirstInstance, LastInstance).

  
  Using Repeat keyword

  SheetSymbolDesignator is the base name for the sheet symbol and FirstInstance and LastInstance together define the number of channels to be instantiated. When the project is built, the Compiler instantiates the channel the required number of times as it builds the internal compiled model, using a chosen annotation scheme to uniquely identify each component in each channel. The channel sub-sheet is not duplicated. Instead, once compiled, a separate tab appears at the bottom of the sub-sheet document in the main design window for each channel on that sheet.

   

   

   

   

   

  Note that the index range must start at 1, starting at 0 (zero) is not supported.
• Font - use the controls to configure the font, font size, color, and special settings such as bold and underlining.
• Justification - select the desired justification of the text.